Fitting



Jan 13, 1942. H, A TRlpLET-r 2,269,960

FITTING Filed Aug. 2, 1940 Patented Jan. 13, 1942 FrmNG Hugh A. Triplett, Wilmette, Ill., assigner to 'Schweitzer & Conrad, Inc., Chicago, Ill., a corporation of Delaware Application lAugust 2, 1940, Serial Nm3-19,710

(Cl. 20o-135) 5 Claims.

This invention relates, generally, to adapters and fittings, and it has particular relation tothe construction of adapters and fittings for renewable or replaceable `fuse links, such as `shown in Triplett application Serial No. 758,372, filed December 20, 1934, to adapt them for luse in various forms of fuse tubes and housings.

An object of this Vinvention is to provide for attaching a flexible conductor to'a metallic sleeve which is adapted to be secured in a detachable manner to a fuse link.

Another object of the invention is to ydeform the sleeve onto the flexible conductor so as to provide good electrical and mechanical connection therebetween.

A further object of this invention is to remove a portion of the deformed part -of the sleeve so as to adapt it for connection to ascrew terminal.

Still another object of the invention is to `exf ternally thread the end of the sleeve from which the flexible conductor projects for receiving a anged fitting to facilitate holding the fuse Ilink attached to the adapter at one end of Ian expulsion type fuse tube.

Other objects of this invention will,.in part, .be obvious and in part appear hereinafter.

For a more complete -understanding of the nature and scope of this invention, reference canv be had to the following detailed description taken in connection with the accompanying drawing, in which:

Figure 1 is a view partly in side elevation and partly in section, showing the metallic sleeve after it has been threaded and before it has been deformed;

Figure 2 is a view, similar to Figure 1, showing the exible conductor in place in the metallic sleeve;

Figure 3 is a view, in side elevation, of the adapter after the sleeve has been deformed onto the flexible conductor and showing the notched intermediate section permitting connection to a screw type terminal;

Figure 4 is a detail sectional view taken along the line 4--4 of Figure 3; and

Figure 5 is a view in side elevation of the fltting adapter, constructed according to this invention, applied to a renewable or replaceable fuse link.

Referring first to Figure l of the drawing, it

will be observed that the reference character I0 designates a metallic tube of good conducting material, such as brass or copper, which is externally threaded as indicated at II at its upper endand is internally threaded, as indicated at I2, at its lower end. The tube I0 is preferably slightly more than two inches long and has an outside diameter of slightly more than onequarter inch. Its walls are relatively thin to permit deforming )or flattening, as will vbe Apresently described. The threads H and I2 are preferably 1/4 inch- 28 in order to conform to generally lstandard fuse link yconstructions now being offered on the open market.

As indicated in Figure 2 of the drawing, the metallic sleeve I0 is arranged to receivea flexible conductor I3 that is formed '-by-a large ynurnber of relatively flne wires through the upper end which carries the external threads 1I I. The flexible conductor I3 projects well within the metallic sleeve I0 so that ,its 'lower end Il is in proximity to y'the upper end of the internal threads .I2.

The metallic sleeve IIl with the flexible conductor I3 assembled therein, as indicated inFigure 2, is placed in a suitable die, and a punch is brought down upon the same so as todeformlthe.

portion I5 between the threaded ends -II and I2 as'indicated in Figures 3 and '4 of the drawing. Sufficient pressure 'is applied so that the walls of the metallic sleeve Ill are pressed into intimate electrical and mechanical engagement withy the wires or strands making up the flexible .-con ductor I3. yAs indicated in Figure 4 ofthe drawing, these fine wires or strands are substantially reduced to solid form.

The flattened portion I5 is provided with a generally semi-circular notch I6 to permit attachment to a screw terminal. 'I'he notch I6 can be formed during the same operation that the intermediate portion I5 is flattened or deformed, or it can be formed subsequently, as desired. The notch IG preferably has a diameter of about 315".

The adapter or fitting is indicated, generally, at I1 in Figure 5 of the drawing where it is shown in completed form, with its threaded lower end I2 threaded onto the threaded projecting terminal I8 of a renewable or replaceable fuse link,

l shown generally at I9. The fuse link I9 may be of the type shown in the Triplett application referred to `hereinbeiore which is illustrative of the general type of renewable or replaceable fuse link that is now available on the open market. The link I9 is provided with a sleeve 20 of insulation which surrounds the fuse link terminals and the fusible means which interconnects them. A flexible lead 2I extends from the sleeve 20 for connection to one line terminal.

It will be noted that a metallic fltting 22 having a anged head 23 is threaded onto the threads II at the upper end of the metallic sleeve I0. This flanged fitting 22 is provided so as to hold the fuse link I9 in place at the upper end of an expulsion type fuse tube. A portion of the threads I I project above the flange 23 as indicated at 24 so as to permit the cap which is threaded onto the upper end of the expulsion type fuse tube to be placed into intimate contact engagement with the upper end of the metallic sleeve I0.

It will be understood that, when the flanged fitting 22 is employed to hold the fuse link I9 sleeve having a notch therein to permit attachment to a screw terminal.

2. For combination with a fuse link, a metallic sleeve threaded at one end for attachment to the fuse link, `and a conductor formed by a plurality of relatively line wires extending out of the other end of said sleeve, said sleeve being ilattened onto said conductor to hold the same in place therein and to provide intimate contact engagement therewith, the iiattened portion of said sleeve having a generally semi-circular notch on one side to permit attachment to a screw terminal.

in place at the upper end of an expulsion type fuse tube, the flexible conductor I3 will be cut oil! where it emerges from the metallic sleeve II). It will also be understood that, where the fuse link I9 is to be connected to a screw terminal, the metallic sleeve I0 will be severed at the upper end of the flattened portion I5, thereby cutting off the threaded upper end I I and the flexible lead I3. l

When it is desired to hold the fuse link I9 at a point midway the ends of an expulsion type fuse tube, then both of the flexible leads I3 and 2| come into play. For this installation the ilanged fitting 2I is removed and the link` I9, with the adapter or fitting Il attached thereto, ifs-insertedl through one end of the fuse tube. The flexible leads I3 and 2| are of suilicient length so `that each extends out of one end of the fuse tube where suitable terminal clamp means are provided as will bereadily understood.

Since `it is obvious that different embodiments of the invention can be made without departing from the scope of the construction described hereinbefore, it is intended' that all matter con* tained in the foregoing description or shown in the accompanying drawing shall be interpreted as illustrative and not in a limiting sense.

What is claimed as new is:

1. For combination with a fuse link, a metallic sleeve, attaching means at one end of said sleeve, and a flexible conductor extending out of the other end of said sleeve, said sleeve being de* formed onto said conductor to hold the same in place therein and provide intimate contact engagement` therewith, the deformed portion of said 3. For combination with a fuse link having external threads at one end, a metallic sleeve internally threaded at one end for engagement with the threaded end of said fuse link and externally threaded at the other end, a flanged litting threaded on the external threads at said other end, and a conductor formed by a plurality of relatively line wires extending out of the said other end of said sleeve and secured therein against relative longitudinal movement.

4. For combination with a fuse link having ex ternal threads at one end, a metallic sleeve internallythreaded at one endfor engagement with the threaded end of said fuse link and externally threaded at the other end,` a iianged fitting threaded on the external threads at said other end, anda conductor formed by a plurality of relatively iine wires extending out of the said other end of said sleeve from a point therein in proximity to its internally threaded end said sleeve being deformed intermediate its threaded ends onto said conductor to hold the same in place therein and to provide intimate contact engagement therewith.

5 For combination with a fuselink having coupling means at one end for mounting the same, a metallic` sleeve having coupling means at each end one of which is adapted to cooperate with said coupling means oi said fuse link, a flanged iltting cooperating with the other coupling means of said metallic sleeve, and a conductor formed Iby a plurality of relatively fine wires extending out of the end of said sleeve associated with said other coupling means and secured in said sleeve against relative longitudinal movement.

1 HUGH A. TRIPLETI. 

